Hitachi H8/500 Series - Page 41

Table 1-4 Pin Functions (cont)
Pin No.
CP-84,
Type Symbol CG-84 FP-80A I/O Name and Function
Serial com- TXD 80 66 O Transmit Data: Data output pins for the
munication serial communication interface.
interface
signals RXD 81 67 I Receive Data: Data input pins for the
serial communication interface.
SCK 82 68 I/O Serial Clock: Input/output pin for the
serial interface clock.
A/D AN
7 – AN0 73 – 66 59 – 52 I Analog Input: Analog signal input pins.
converter
AV
CC* 74 60 I Analog Reference Voltage: Reference voltage
and power supply pin for the A/D converter.
AV
SS* 65 51 I Analog Ground: Ground pin for the A/D
converter.
Parallel P1
7 – P10 10 – 3 79 – 72 I/O Port 1: An 8-bit input/output port. The
I/O direction of each bit is determined by the port 1
data direction register (P1DDR).
P2
4 – P20 15 – 11 4 – 1, I/O Port 2: A 5-bit input/output port. The
80 direction of each bit is determined by the port 2
data direction register (P2DDR).
P3
7 – P30 32 – 25 20 – 13 I/O Port 3: An 8-bit input/output port. The
direction of each bit is determined by the port 3
data direction register (P3DDR).
P4
7 – P40 40 – 33 28 – 21 I/O Port 4: An 8-bit input/output port. The
direction of each bit is determined by the port 4
data direction register (P4DDR). These pins
can drive LED indicators.
* When A/D converter is not used, AV
CC should be connected to VCC, and AVSS should be
connected to GND.
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